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package com.oracle.truffle.nfi.test;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.nfi.test.interop.TestCallback;
import com.oracle.truffle.tck.TruffleRunner;
import com.oracle.truffle.tck.TruffleRunner.Inject;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(TruffleRunner.class)
public class ThreadNFITest extends NFITest {

    public static class CreateThread extends SendExecuteNode {

        public CreateThread() {
            super("createThread", "(env, (env, sint64):sint64, sint64) : pointer");
        }
    }

    public static class JoinThread extends SendExecuteNode {

        public JoinThread() {
            super("joinThread", "(env, pointer) : sint64");
        }
    }

    static final class ChildData {
        volatile boolean isEntered;
        volatile long arg;
        volatile Thread thread;
    }

    @Test
    public void testNativeThread(
                    @Inject(CreateThread.class) CallTarget createThread,
                    @Inject(JoinThread.class) CallTarget joinThread) throws Throwable {
        Thread parent = Thread.currentThread();
        ChildData childData = new ChildData();

        TestCallback fn = new TestCallback(1, (args) -> {
            childData.isEntered = runWithPolyglot.getTruffleTestEnv().getContext().isEntered();
            childData.arg = (long) args[0];
            childData.thread = Thread.currentThread();
            return childData.arg + 1;
        });

        Object thread = createThread.call(fn, 42L);
        Object ret = joinThread.call(thread);

        Assert.assertTrue("isEntered", childData.isEntered);
        Assert.assertEquals("arg", 42L, childData.arg);
        Assert.assertNotSame("thread", parent, childData.thread);

        Assert.assertEquals("ret", 43L, ret);
    }
}
